<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="/static/plugins/bootstrap-3.4.1/dist/css/bootstrap.css">
    <title>Title</title>
    <style>
        .account {
            width: 500px;
            border: 1px solid #dddddd;
            {#height: 350px;#}
            margin-right: auto;
            margin-left: auto;
            margin-top: 300px;
            padding: 20px 40px;
            border-radius: 5px;
            box-shadow: 5px 5px 5px #0f0f0f ;
        }
        .account h1{
            text-align: center;
            margin-top: 10px;
        }
    </style>
</head>
<body>
<div class="account">
    <h1>用户登录</h1>
    <form>
        <div class="form-group">
            <label for="exampleInputEmail1">用户名</label>
            <input type="email" class="form-control" id="exampleInputEmail1" placeholder="请输入用户名">
        </div>
        <div class="form-group">
            <label for="exampleInputPassword1">密码</label>
            <input type="password" class="form-control" id="exampleInputPassword1" placeholder="请输入密码">
        </div>

        <button type="submit" class="btn btn-  ">登录</button>
    </form>
</div>
</body>
</html>